Rubber butt pad - reduces felt recoil, provides 7/8" extra length and reduces weight. Non-slip surface, replaces the standard steel buttplate and attaches with the same screws. This is a copy of the original late production GI butt pad, re-engineered with a rubber recoil pad instead of the hard plastic material used for the GI part. Actually reduces recoil instead of just giving you a different bruise pattern on your shoulder.